<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>尚硅谷官网</title>
    <style>
        * { 
            font-family: Arial; 
            font-size: 14px; 
            margin: 0; 
            padding: 0; 
            border: none; 
        }
        a { text-decoration: none; }
        ul { list-style: none; }

        html,body {
            width: 100%;
            height: 100%;
        }
        body {
            background-image: url('../images/bg.jpg');
            background-repeat: no-repeat;
            background-size: cover;
        }
        .page-header {
            height: 70px;
            background-color: rgba(0, 0, 0, 0.7);
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 20px;
        }
        .header-nav {
            display: flex;
            
        }
        .header-nav li a {
            color: white;
            font-size: 20px;
            border: 1px solid white;
            border-radius: 8px;
            padding: 10px;
            margin-right: 20px;
        }
        .header-nav li:last-child a {
            margin-right: 0;
        }
        .page-content {
            display: flex;
            height: calc(100vh - 70px);
        }
        .content-nav {
            width: 1000px;
            height: 300px;
            margin: auto;
            display: flex;
            justify-content: space-evenly;
            align-items: center;
        }
        .content-nav .item {
            width: 180px;
            height: 200px;
            background-color: orange;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: space-evenly;
            transition: 0.2s linear;
            cursor: pointer;
        }
        .content-nav .item:hover {
            box-shadow: 0px 0px 20px black;
        }
        .content-nav .item span {
            font-size: 20px;
            color: white;
        }
        .content-nav .item:nth-child(1) {
            background-color:#595CA8;
        }
        .content-nav .item:nth-child(2) {
            background-color:#FF9D2E;
        }
        .content-nav .item:nth-child(3) {
            background-color:#01A6DE;
        }
        .content-nav .item:nth-child(4) {
            background-color:#015E91;
        }
        .content-nav .item:nth-child(5) {
            background-color:#1DC128;
        }
    </style>
</head>
<body>
    <!-- 头部 -->
    <header class="page-header">
        <a href="#">
            <img src="../images/logo.png" alt="logo">
        </a>
        <ul class="header-nav">
            <li><a href="#">国内校区</a></li>
            <li><a href="#">缅甸校区</a></li>
            <li><a href="#">非洲校区</a></li>
            <li><a href="#">美国校区</a></li>
        </ul>
    </header>
    <!-- 内容区 -->
    <div class="page-content">
        <div class="content-nav">
            <div class="item">
                <img src="../images/item1.png" alt="">
                <span>我的邮箱</span>
            </div>
            <div class="item">
                <img src="../images/item2.png" alt="">
                <span>云服务</span>
            </div>
            <div class="item">
                <img src="../images/item3.png" alt="">
                <span>手机课堂</span>
            </div>
            <div class="item">
                <img src="../images/item4.png" alt="">
                <span>微信服务</span>
            </div>
            <div class="item">
                <img src="../images/item5.png" alt="">
                <span>在线客服</span>
            </div>
        </div>
    </div>
</body>
</html>